◎ Great chemical stability;
◎ Low coefficient of thermal expansion, resistance to cracking, spalling and thermal shock;
◎ Higher mechanical strength;
◎ Higher machining accuracy and good surface finish;
◎ Long operation life.
Regular Power (RP) Graphite Electrodes are suitable for all kinds of AC/DC Regular Power Electric Arc Furnaces, Resistance Furnaces, Submerged Electric Furnaces for smelting all kinds of alloy steel, metal, non-metal, etc.
Graphite electrodes are selected based on some of the following application considerations:
• Furnace design
• Scrap requirements
• Charging practice
• Burner/Oxygen usage
• Water spray rings
• Fume control system
• Meltdown/Refine/Tap-to-Tap Time
• Power level
• Slag practice
| Items | Classification | Unit | Nominal Diameter (mm) | |||||||||
| 75-130 | 150-225 | 250-300 | 350-450 | 500-800 | ||||||||
| Grade A | Grade B | Grade A | Grade B | Grade A | Grade B | Grade A | Grade B | Grade A | Grade B | |||
| Resistivity | Electrode | μΩm | 8.5 | 10.0 | 9.0 | 10.5 | 9.0 | 10.5 | 9.0 | 10.5 | 9.0 | 10.5 |
| Nipple | 8.0 | 8.0 | 8.0 | 8.0 | 8.0 | |||||||
| Bending Strength | Electrode | Mpa | 10.0 | 10.0 | 8.0 | 7.0 | 6.5 | |||||
| Nipple | 15.0 | 15.0 | 15.0 | 15.0 | 15.0 | |||||||
| Young’s Modulus | Electrode | Gpa | 9.3 | 9.3 | 9.3 | 9.3 | 9.3 | |||||
| Nipple | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | |||||||
| Bulk Density | Electrode | g/cm3 | 1.58 | 1.53 | 1.53 | 1.53 | 1.52 | |||||
| Nipple | 1.70 | 1.70 | 1.70 | 1.70 | 1.70 | |||||||
| CTE (100℃-600℃) | Electrode | ×10-6/℃ | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | |||||
| Nipple | 2.7 | 2.7 | 2.8 | 2.8 | 2.8 | |||||||
| Ash Content | % | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | ||||||
| Grade | Nominal Dia. | Allowable current A |
Current density A/cm2 |
| RP electrode | 200mm | 500～6900 | 15～21 |
| 250mm | 7000～10000 | 14～20 | |
| 300mm | 10000～13000 | 14～18 | |
| 350mm | 13500～18000 | 14～18 | |
| 400mm | 18000～23500 | 14～18 | |
| 450mm | 22000～27000 | 13～17 | |
| 500mm | 25000～32000 | 13～16 | |
| 550mm | 28000～34000 | 12～14 | |
| 600mm | 30000～36000 | 11～13 | |
| 650mm | 32000～39000 | 10～12 | |
| 700mm | 34000～42000 | 9～11 |
